<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>EL表达式</title>
</head>
<body>
    用户名：${name}
    <br>
    Cookie.JSESSIONID：${cookie.get("JSESSIONID").value}
    <br>
    Header：${header.get("User-Agent")}
    <br>
    当前有<span style="color: red;font-size: 28px;">${applicationScope.get("onlineCount")}</span>人在线
</body>
</html>
